Jewel and pivot gage



(No Model.)

.J.E.AD0 0X.l JEWEL -AND P IVQT GAGE.

- Paented Eu Y. 1-, 1893.

UNITED STATES PATENT GEEICE.

JOSEPH EPH-RIAMADOOX, `OE LEBANON, OREGON.

J EwEL. AND; PIVOT GAGE.

SPECIFICATION forming partvofLetters :Patent No. 5O.2,64l8,'dated 1,1,893.

Application insa muys, 1892.

To all whom t may concern: Y

Be it known that I, JOSEPH EPHRIAM ADLl COX, of Lebanon, in the countyof Linn and State of Oregon, have invented certain new and usefulImprovements in Jewel and Pivot Gages; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable Others skilled in the art to which it appertains tomake and use the same.

This invention relates to a new and improved jewel and pivot gage, andit has for its object the production of cheap, simple, and highlyefficient means for measuring holes in watch jewels, or any otherarticle 'where the exact diameter of a hole in a substance is requiredeven to a small fraction of an inch, centimeter or millimeter; and alsoto facilitate the measurement of watch pinions, arbors, &c., and variouspivoA s, the exact diameter being obtained. l Y

The invention consists of a jewel orrpivot gage having a dialdividedinto fractional parts of an inch, centimeter or millimeter, anindex hand movable thereover by a rotary shaft, and a bar having anupper pointed end and designed to rotatesaid shaft, the upper end ofsaid bar being designed to be projected through the hole the diameter ofwhich is to be ascertained.

The invention further consists of a jewel or pivot gage having a dialdivided into fractional parts of an inch, centimeter o r millimeter, anindex hand movable thereover by a rotary shaft, a bar designed to rotatesaid VVshaft, and a pair of calipers, one part or member of which ismovable with said bar, the pinion,the arbor, pivot or the like to bemeas-v ured,being designed to'be placed between the parts of saidcalipers.

The invention also comprises the detail construction,combination andarrangement of parts, substantially as hereinafter fully set forth andpartieularlypointed out in the claims.

In the accompanying `drawingszV--Figure l is aview inperspective ofmyimproved jewel or pivot gage, parts being removed. Fig. 2 is a planview of the dial. Fig. 3 is an enlarged view of the main arbor and itsadserinnaasaizi. (Nomads.) A

j uncts. Fig. 4 is a lview showing the cone and collar for the upper endof the arbor. Fig. 5 is a view of a slight modification. Y Referring tothe Ydrawings,`A designates a box or case,an d a, a rotaryshaft passedlongitudinally through said box or case, and supported at its ends byplates a attached to the ends of the box. Upon shaft a near one end is apinion a2, and nearv its other end is a crown-wheel ai Y B is avertically 'disposedbarg guided at its ends by tubes l), b projectingfrom-plates b2, b3, secured, respectively, to the top and bottom of boxA, the ends ofsaidzbar being circularly reduced. In one side of thisarbor are rack-,teeth b4 desiguedto engage with pinion a2, and effectthe-rotation of shaft @when said arborlis depressed.

C designates a pair of calipers, composed of the stationary` partd'attached at d to the end of box'A'and projecting'out lthrough a slot inthe" side of vsaid '--box,fand a movable part d2 securedto barB. Theouter ends of these parts dfdz, are curvedsoas to form a guide for theentrance of ra shaft or pivot to be gaged. A coil spring D encircles thelower end of bar B and-tube b and bears against the inner end of partcl2 of the calipers, the same serving to hold the bar B normallyelevated and the-parts of the calipers closed together. 4

E is a vertical arbor projected through an opening in the top of box Aand having an index hand etsecured thereto, the lower end of saidarborrbeing supported by a coil spring e. Upon this arbor E is a pinionc2 with which the crown wheel a3 is designed to en- 'gage and .throughthis agency motion Iis imparted to the index arbor. The index handetravels over a circular dial F, located over the top of box A.

For ascertaining the diameterv of holes in jewels, I employ a truetapering cone G which screws down on a threaded extension :of the conecan be inclosed by a collar g designed to be slipped down thereover andrest upon the upper end of tube b. When the collar g is removed the topof tube v b acts as a stop for the jewel held on the cone, but when thecolupper end of bar B. The lower end of-this 95 ICO lar is employed theupper thereof` serves as such stop. A cup-like plate II having a centralcylindrical portion fits over tube b and serves to catch any jewels thatmay fall in the measurements of the holes thereof.

The figures on the dials are arranged in three consecutive circles, as7L, h', h2. I use for a standard one-twentieth (l-20) of an inch. Hencewhen the parts of the calipers are separated to one-twentieth of an inchthe index hand will have made one circumference of the dial. The circlesof the dial are divided into one hundred (100) degrees. Consequently onetwentieth (lO) of an inch being the stand-` ard, each degree shows onetwo-thousandth of an inch, and half degrees one four-thousandth of aninch. For measurement with the calipers of staffs, arbors, pivots andthe like, the figures of the outer circle h2 are used, and read to theleft, thus 5/2000; 10/2000; 15/ 2000, dto., around to 10U/2000 of aninch, which is, of course, one-twentieth of an inch. In measuring holesin jewels and the like I use the second circle h. The reading is startedat 1GO/2000. Thus: 105/2000; 11G/2000 of an inch and so on. The cone Gis one-tenth (1-10) of an inch in length and at the top of tube b is onefortieth (L40) of an inch in diameter. Consequently the cone measuringone-fortieth (L40) of an inch in diameter and tapering to a point atone-tenth (l-lO) of an inch in length and divided into one-hundred (100)spaces, each space shows one eight-thonsandth of an inch. Vhen thecollar g is not used the inner circle 71. forms the basis ofmeasurement, the top of tube b serving as a stop for the jewel orsubstance measured on the cone, and said cone is pressed down until theindex hand reaches 200 on theinner circle h ofthedial.TheconeGisone-fortiethofaninch in diameter at the top of tube b and alsofor a distance of one-tenth of an inch. Hence the index hand will makeone complete circumfer ence of the dial for each section of the cone.lVhen the index hand will have made one circumferenceof the dial thecone measures oneeightieth of an inch in diameter at top of tube b,commencing at 200 on dial, which means two hundred eight-thousandths ofaninch, equals one-fortieth, the reading being 105 SOOO 11G/8000, &c.WVhen the collar gis employed, the projecting end of the cone is butone-twentieth of an inch and the cone measures oneeightieth of an inchin diameter at top of said collar. Vhen the collar is used and the indexhand is at 100 on middle circle h', it means one hundredeight-thousandths or one-eightieth of an inch, and the reading is 5 8000and so on. By this arrangement I greatly facilitate the reading. Forexample: say an opening in a jewel measures forty eight-thousandths ofan inch. ,This I divide by four which gives ten two-thousandths of aninch, the size of the pivot required being nine twothousandths. Infitting jewels to pivots the reverse is the result. If the diameter ofthe hole to be measured is greater than one-eightieth of an inch, collarg is removed and the top of tube b serves as a stop for the jewels.

Vith this explanation the operation and advantages of my invention areapparent. It will be observed that the smaller the diameter of the holein the jewel the greater distance the bar B is depressed. The depressingof this bar, either by a jewel on the cone, or by placing staffs, pivotor the like, within the calipers, the shaft a will be made to rotate andmotion be imparted to the arbor carrying the index-hand.

It will be seen that I have produced a jewel and pivot gage which isextremely simple in construction; inexpensive and durable and that it isnot liable to readily get out of order or be deranged.

In Fig. 5 I have shown a slight modification of the form of connectionbetween the barB and the operating shaft. In lieu of the pinion andrack-teeth, I employ a wheel t' on shaft a to which is connected one endof a chain i', the other end thereof being secured to bar B. This formis employed when a change of standard is made from a fraction of an inchto centimeters or millimeters. 0r any fractional part of an inch,centimeter or milli meter can be employed as a standard byenlarging orreducing the circumference of crown-wheel a3 and increasing or reducingthe number of teeth in said wheel accordingly.

I claim as my invention l. A gage for jewels and arbors, pivots and thelike, having a dial of the character stated, the index hand movingthereover, a movable bar having an upper reduced end for the jewels, apair of calipers connected with said bar, and suitableconnectingmechanism between said bar and said index hand, substantiallyas set forth.

2. The herein-described improved gage for jewels and arbors, comprisingthe vertically disposed movable bar, the horizontal rotary shaftoperated thereby, the vertical arbor having an index hand and operatedby said shaft, and the dial having an arrangement of iigures thereon ofthe characterherein-described, substantially as set forth.

3. The herein-described improved gage for jewels and arbors, comprisingthe vertically disposed movable bar having an upper reduced end, guidestherefor forming a stop, the horizontal rotary shaft operated by saidbar, the arbor operated by said shaft and having an index hand on itsupper end, and the dial over which said hand travels, substantially asset forth.

4. The herein-described improved gage, comprising the movable bar havinga cone end, tubes through which said bar is passed, a collar designed torest on one of said tubes and inclose said cone end, the rotary shaftoperated by said arbor, the bar operated by said shaft and having anindex hand, and the dial, substantially as set forth.

5. The herein-described improved gage,

IZO

comprising the movable bar, the tubes guiding the same, the springholding said bar, the rotary shaft movable with said bar, the dial, thearbor having an index hand extending over said dial, the springsupporting said ar-V bor, and the connection between said arbor andshaft, as set forth.

6. The herein-described improved gage for jewels and arbors, comprisingthe vertical bar having teeth, the horizontal rotary shaft having apinion meshing with said teeth, the arbor carrying an index hand'at itsupper end and operated by said shaft, the dial, and the removable coneon the upper end of said bar, as set forth.

7. The herein described improved gage, comprising the verticallydisposed movable bar, the horizontally disposed calipers havingone ofits parts movable with said bar, the rotary shaft operated by said bar,the dial, and the arbor carrying an index hand and operated by saidshaft, as set forth.

8. The herein described improved gage, comprising the box having a slotin one side, the movable bar having teeth, the calipers extended throughsaid slot and having one part secured to said box, the other part beingattached to said bar, the rotary shaft having av pinion engaging saidteeth, the crown-wheel on said shaft, the arbor having a pinion inengagement with said crown-wheel, the dial, and the index hand securedto said latter bar, substantially as set forth.

9. The herein described improved gage, comprising the box, the tubessecured to the top and bottom thereof, the bar having a spring support,and provided with teeth, the cone on the upper end of said bar, theinclosing collar, the rotary shaft having a pinion meshing with saidteeth, the crown-wheel on said shaft, the dial, the arbor having anindex-hand over said dial, the pinion on said arbor, and the springsupporting the latter, substantially as set forth.

10. A jewel gage of the character hereindescribed, having a movable baron which the jewels are fitted, and a removable cup-like plateencircling said bar beneath the upper vend thereof, as set forth.

`In testimony whereof'I have signed this specification in the presenceof two subscrib-V ing witnesses.

JOSEPH EPHRIAM ADCOX. Witnesses:

A. FRUM, W. C. PETERSON.

ssy

